APA (7th ed.) Citation

Duhár, I., & Kijonka, E. Petrík.

Chicago Style (17th ed.) Citation

Duhár, Ivan, and Edmund Kijonka. Petrík.

MLA (9th ed.) Citation

Duhár, Ivan, and Edmund Kijonka. Petrík.

Warning: These citations may not always be 100% accurate.